what your looking for in JUNOS land is called an RVI (Routed VLAN Interface) -- basically applies an IP address to a VLAN --
first create the vlan IP: set interfaces vlan unit XYZ family inet address x.x.x.x/y
then associate that interface to your vlan: set vlans ABC l3-interface vlan.XYZ
there is no requirement for the vlan unit to be the same as the vlan-id, but it is best practice to help make troubleshooting and understanding the config easier.
and then since this is an SRX you need to associate that RVI to a security zone, make sure policies allow the proper traffic, etc etc
good luck